R-CALF USA is calling on the FDA to approve ivermectin to help protect livestock from the possible spread of New World screwworm in the U.S.
The group says that feed-grade ivermectin is a proven tool to protect domestic herds and wildlife, especially in southern border states.
They highlight the success of the drug in limiting the spread of cattle fever tick.
“The potential impact on the United States livestock markets would be immensely negative if an actual case of New World screwworm was identified in the USA. Until an adequate response with gamma ray irradiation of male screw worm flies can be implemented, the feeding of ivermectin is a very real defense.”
The request follows false reports that New World screwworm was found in Missouri. That claim caused a downturn in cattle futures markets and is now being investigated by the state of Missouri.
September 23, 2025 09:42 AM
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With the latest detection just across the border, animal health officials on both sides are intensifying efforts to contain the outbreak before it spreads further north.
September 22, 2025 09:51 AM
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Sen. Roger Marshall, a founding member and chairman of the Make America Healthy Again caucus, joined us with his thoughts on the commission’s latest report and the key ag-related issues.
September 17, 2025 04:36 PM
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“Continue to help us push the New World screwworm back to the Darién Gap and hopefully towards eradication.”
September 16, 2025 10:49 AM
September 12, 2025 12:19 PM
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The Cotton Jassid previously detected in Georgia has now made its way to the Lone Star State.
September 10, 2025 03:17 PM
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“I don’t think we’re going to see cattle coming across the border at all because of that increase in their cases in Mexico.”
“We as NCBA, we’re not shocked to see that there is a human case.”
